This paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [Phys. Rev. Lett. 119, 201103PRLTAO0031-900710.1103/PhysRevLett.119.201103]. We systematically explore the parameter space that characterizes the progenitor stars, the equation of state, and the scalar-tensor theory of the core collapse events. We identify a remarkably simple and straightforward classification scheme of the resulting collapse events. For any given set of parameters, the collapse leads to one of three end states: a weakly scalarized neutron star, a strongly scalarized neutron star, or a black hole, possibly formed in multiple stages. The latter two end states can lead to strong gravitational-wave signals that may be detectable in present continuous-wave searches with ground-based detectors. We identify a very sharp boundary in the parameter space that separates events with strong gravitational-wave emission from those with negligible radiation.
Rosca-Mead, R., Sperhake, U., Moore, C., Agathos, M., Gerosa, D., Ott, C. (2020). Core collapse in massive scalar-tensor gravity. PHYSICAL REVIEW D, 102(4) [10.1103/PhysRevD.102.044010].
Core collapse in massive scalar-tensor gravity
Gerosa D.;
2020
Abstract
This paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [Phys. Rev. Lett. 119, 201103PRLTAO0031-900710.1103/PhysRevLett.119.201103]. We systematically explore the parameter space that characterizes the progenitor stars, the equation of state, and the scalar-tensor theory of the core collapse events. We identify a remarkably simple and straightforward classification scheme of the resulting collapse events. For any given set of parameters, the collapse leads to one of three end states: a weakly scalarized neutron star, a strongly scalarized neutron star, or a black hole, possibly formed in multiple stages. The latter two end states can lead to strong gravitational-wave signals that may be detectable in present continuous-wave searches with ground-based detectors. We identify a very sharp boundary in the parameter space that separates events with strong gravitational-wave emission from those with negligible radiation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.